Sir James Clark Ross and Sir John Ross

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…volcano on Antarctica), and Mount Terror (a smaller, extinct volcano). James Clark Ross also discovered the Victoria Barrier, which was later renamed the Ross Ice Shelf. Ross allowed navigators all over to use the compass with greater accuracy. He recorded his experiences in his Voyage of Discovery and Research to Southern and Antarctic Regions (1847) He later made another visit to the Arctic in search for Sir John Franklin in 1848. James Clark Ross does on April 3, 1862.